Sulfonated aromatic polyisocyanates and preparation of stable anionic polyurethane or polyurea latices therefor

Abstract

Self-emulsified polyurethane or polyurethane-polyurea or polyurea latices formed by reacting an aromatic polyisocyanate such as a polyurethane prepolymer with a strong sulfonating agent selected from H 2 SO 4 , SO 3 , ClSO 3 H, and mixtures thereof, converting the sulfonated polyisocyanate to a sulfonic acid salt by reaction with a base, and mixing the polyisocyanate in water to obtain chain extension and self-emulsification thereof.

What is claimed is: 
     
       1. A polymeric compound of the formula ##STR10## wherein R is a prepolymer chain having the structural formula   -Ar - NH - CO - O (alkyleneoxy).sub.m alkylene -     Ar is an aromatic nucleus independently selected from the group consisting of toluene, diphenylmethane and diphenylether, and   m is a number selected such that the alkyleneoxy moiety has a molecular weight ranging from about 300 to about 5000.   
     
     
       2. A polymeric compound according to claim 1 wherein m is a number selected such that the alkyleneoxy moiety has a molecular weight ranging from about 400 to about 3000.